Centrifugal cream-separator.



m. 857,273. PATENTED JUNE 18, 1907. A. FORSBERG.

GENTRIFUGAL CREAM SEPARATOR. APPLIOATION FILED snr'r.za,1so4.

c j L ERIK AUGUST FORSBERG,

or STOCKHOLM, SWEDEN, ASSIGNOR TO AKTIEBOLAGET SEPARATOR, OF STOCKHOLM, SWEDEN.

CENTRIFUGAL CREAM-SEPARATOR.

I Specification of Letters Patent.

Patented June is, 1e07.

Application filed September 29 190.4. Serial No. 225,620.

To all whom it may concern:

Be it known that I, ERIK AUGUST Fons- BERG, a subject of the King of Sweden, residing at Stockholm, Sweden, have invented certain new and useful Improvements in Liners for Centrifugal Cream-Separators; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the artto which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters or figures of reference marked thereon, which form a part of this specification.

My invention relates to centrifugal machines, and particularly liquid separators for separating whole milk-into its constituents of skim milk and cream.

In one t pe of cream separator there is provided a 1ner or division contrivance consistin of superposed conical division plates,

and a ove them an-upper plate having an upwardly extending neck surroundin the feed tube, the separated skim milk being drawn off outside the upper plate through one or more suitable outlets, the separated cream rising within the upper plate and be ing drawn off through another outlet. In this type of cream separator the outlet or outlets for the skim milk are usually arranged in the she e of hollow screws, screwed into the bowl nec By means of this screw, the relation between the quantities of the two fluidsthat are passed through the two different outlets, is regulated. Experience has shown, however, that there are certain inconveniences and disadvantages attached to the taking out of the skim milk through one or more regulating screws, chief among which is that the rapidity of discharge of the separated fluid becomes quite considerable on account of the small diameter of the discharge orifices, and this, again causes foam.

My invention has for its object to avoid this principal inconvenience or disadvantage, and it consists in arranging the outlet for the skim milk in the shape of one or more, preferably horizontal, slits in the bowl neck, through. Which the skim milk is freely passed into the surrounding vessel. The regulation of the relation between the two fluids is affected at the cream outlet, by means of a regulating screw engaging the wall of the neck of the upper'plate.

The invention will be more fully understood byreference to the drawings, in which Figure 1 is a vertical section through a centrifugal separator bowl embodying my invention. Fig. 2 is a side view of the block through which the cream passes on its way to the cream outlet.

-a is the bottom of the bowl, b the feed tube, 11 the outer wall of the bowl.

0 representsthe conical division plates. (1 is the upper plate composed of a lower conical portion having a shape and function similar to any of the plates 0, and an upwardly extending neck extending within the neck of the bowl and surrounding the feed tube, and of a diameter substantially larger thanthe feed tube. The upper end of the neck of the feed tube tightly engages and embraces the feed tube.

e is a wing secured to the upper plate and extending to and pressing against the inner wall of the bowl.

Immediately above the shoulder formed at the junction of the body and neck of the bowl, the neck 9 of the bowl is provided with one or more horizontal outlet slits h in the bowl neck. Immediately below this outlet slit is a lip 0 consisting of an annular plate resting abovethe'said shoulder. The object of this lip is to prevent any adherence of the fluid to the outer surface of the bowl.

Between the central feed tube and the neck of the.upper plate is a block 11, which, as shown in Fig. 2, is provided with a groove Z, the upper part of which is enlarged and rounded. The enlarged rounded upper end of this groove is threaded and adapted to receive the cream screw.

Between the outer wall of the neck of the bowl and the neck of the upper plate, and outside the block ll,'lS inserted a block 76 having a threaded hole to receive the cream screw. The cream screw is provided with a central orifice, as usual. Opposite the block it there is provided a hole n in the bowl-neck.

The whole milk entering the central feed tube is thrown out through bottom opening into the separating chamber, and passes in between the plates, when the separation takes place in the well known manner; The separated skim milk is thrown to the periphery of the bowl and moves upward until it reaches the slit or slits it, through which it escapes into an appropriate and well known fsurrounding receiving vessel (not shown).

The separated cream moves upward inside the neck of the upper plate, and is thrown out, through the regulating screw m and hole 7t, into itswell known receiving vessel; (not shown). By screwing in: the cream screw, the cream levelcan be regulated in the ordinary manner.

Having now fully described my invention,

what I claim and desire to protect by Letters Patent is:

1. In a centrifugal cream separator, the

combinationof a centrifugal howl provided with an unobstructed disc milk, a liner therein consisting of superposed arge for the skim conical plates, an upper plate upon the liner, extendlng 111l30 the bowl neck and closed V against the central feed tube of the bowl, and

a hollow regulating screw connected with the upper platefor regulating the discharge of the cream and drawing it ofl from the inner space of the upper plate.

2. In' a centrifugal cream separator, the

, combination of a centrifugal bowl provided extendin 'with an unobstructed discharge for the skim milk, a linertherein consistingof superposed conical p1ates, an upper plate upon the hner,

; a ainst t e central feed tube of the bowl, a

combination of a centrifugal bowl provided b ock secured tothe neck of the upper plate. and a hollow regulating screw in said block for regulatin' the discharge of the cream and drawing it o& from'the inner space of the up Per Plate. r

3.- In a centrifugal cream separator, the" with an unobstructed disc arge for the skim milk, a liner therein consisting of'superposed conical-plates, an upper plate upon the liner,

into the bowl-neck and closed extendin "into the bowl neck: and closed a ainst t e central "feedtube of the bowl, a

b ock secured to the neck of the upper plate,

an orifice in the said upper late an a hollow regulating screw in the sai block, the hole in the regulating screw alining with the orifice in the upper plate.

4. In a centrifugal cream separator, the combination of a centrifu a1 bowl provided with an unobstructed disc/h 5. 'In a centrifugal cream separator, the

combination of-a centrifu al bowl provided. with an unobstructed disc arge for the skim milk, a liner therein consisting 'of superposed conical plates, an upper plate upon the lmer, I the bowl-neckand closed; against the central feedtube o f-the bowl, the

extending -1nto neck of the bowl being provided with a slit for the discharge oftheskim-milk and the up' per plate provided with a hollowiregulating lating the discharge of the screwfor re cream and rawing space of the upper plate.

it hit from the inner In -test1mon y, that I claim the foregoing-as my invention, I have signed ,my name 1n presence of two subscribing witnesses,

arge for the skim nnlk, a liner therein consisting of, super osed ERI Answer freRsB aa. 

